Apple’s upcoming iPhone Duo, the company’s first foldable smartphone, will rely on eSIM technology for mobile connectivity, according to recent reports. Unlike traditional smartphones that use a physical SIM card inserted into a slot, the iPhone Duo does not have a physical SIM card slot. Instead, it uses an embedded SIM, or eSIM, which is a digital SIM card built into the device. This means users will need an eSIM-compatible mobile plan to access cellular data, make calls, and send messages. If a user’s mobile carrier does not support eSIM, the iPhone Duo will only be usable with a Wi-Fi connection. The iPhone Duo is set to be available for pre-order in France starting October 16, 2026, with official release on October 23 of the same year. Several major mobile operators in France, including Orange, SFR, Bouygues Telecom, and Free, support eSIM technology. Additionally, brands such as Sosh, RED, and B&You also offer eSIM plans. However, some budget mobile providers, such as Cdiscount Mobile, NRJ Mobile, Auchan Telecom, Syma Mobile, and Source Mobile, do not support eSIM, which could limit connectivity options for users on these networks. YouPrice, another mobile provider, offers eSIM plans only for those using the Orange network, and not for SFR or Bouygues Telecom. For individuals, La Poste Mobile does not support eSIM technology either. However, several smaller operators, including Prixtel, Coriolis, Lebara, Lycamobile, Réglo Mobile, and TeleCoop, do provide eSIM-compatible plans. Users who choose these providers can purchase the iPhone Duo with a compatible plan without any issues. If a user’s preferred mobile provider does not offer eSIM support, they can still buy the iPhone Duo but will be restricted to Wi-Fi-only connectivity. This means they will not be able to use cellular data, make calls, or send messages over a mobile network. As the iPhone Duo becomes available, users will need to check with their mobile provider to ensure compatibility with eSIM technology to fully utilize the device’s features.